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spec: But nothing is anymore . In this view , classroom space becomes the place for a creative interplay of forces , where ideas , as well as teachers and students , come alive . For example , there are a number of distance learning initiatives around the System that will require funding to implement and support in the long term , and at this time , it is not clear what those costs will be . As well as maintaining momentum – and not withstanding my confidence that you are able to achieve this - there remain a number of areas where more work is needed . All rely on the fact that certain elements ( particularly uranium and potassium ) contain a number of different isotopes whose half-life is exactly known and therefore the relative concentrations of these isotopes within a rock or mineral can measure the age . There are a number of courses and topics from which you can choose , and your work in these courses will help develop your abstract thinking skills , your problem solving strategies , and your ability to communicate effectively ( both in your writing and in your speaking ) . Furthermore , the Committee assessed the findings of a recent International symposium on liberalization and trade in tourism services , showing that trade and specifically tourism-related policies at national level are poorly coordinated and that groups of countries , generators and recipients of visitor flows , are not equitably equipped with consumer protection , competition and '' sustainability `` laws , thus making it difficult for countries not enjoying an adequate regulatory structure to reap the benefits of liberalization . Chris is still trying to give back the dining room table which leads to a fridge full of beer and the gaming habits of women and geeks . However , microarrays also pose a number of new challenges . Part of the problem is that many products contain a number of different elements , each of which may be acting on several different aspects of human physiology . However , some combination of prospective and retrospective analysis may be reasonable if uncertainties have been mitigated through time , accomplishment , and substantive interviews with participating companies , their customers , and market experts .